What we wouldn't give to see a feather-haired Ashton Kutcher [1] in a pair of bell-bottoms again. The actor portrayed Michael Kelso for 183 episodes on That '70s Show [2], and we miss that goofy playboy. Kutcher turns 38 this weekend, and we're taking a trip down memory lane to remind ourselves why Kelso will always be the coolest — too bad he's taken by Jackie. (Just kidding, they're adorable [3].)

Every time the credits roll and he's the most into it.

When you're kind of scared by his laughter . . . but also comforted.

When he's not afraid to show a little skin.

When he does a great impression of David Bowie.

This time he expertly utilizes props for theatrical effect.

When he's eternally, unflappably optimistic.

This time he is the largest elf that ever existed.

Every time he enjoys a supersick burn.

Which is pretty much all the time.

He just loves them so much.

This time he gets unexpectedly deep.

Whenever his catlike gracefulness gets the best of him.

When he just can't deal with Hyde anymore.

Whenever he hears about nudity anywhere.

This time he explains what Canadians are doing at any given time.

When math forces him to disrobe.

Whenever he says the sweetest things to Jackie.

When he proves to be an expert at the art of reading ladies.

When his laughter cannot be controlled.

When he admits that he's really just a big teddy bear.

When he gets excited talking about his favorite things.

And then when he actually sees them.

When he gets into Business Kelso mode.

When his attempt at reuniting with Eric is thwarted by Donna.

When he celebrates a win with a little dance.

Any time he gets a good idea.

When he confesses to somewhat gross secrets.

When he sports a mustache and you're still like "dayyyum."

When he compares himself to a condiment.

When he finds joy in the small things.